CVE-2024-1268: Restaurant POS System RCE Vulnerability

CVE-2024-1268 Overview

A critical unrestricted file upload vulnerability has been identified in CodeAstro Restaurant POS System version 1.0. The vulnerability exists in the update_product.php file, which fails to properly validate uploaded files. This flaw allows remote attackers to upload malicious files without authentication, potentially leading to remote code execution and complete system compromise.

Critical Impact

Remote attackers can exploit this vulnerability to upload arbitrary files, including web shells and malicious scripts, enabling full system compromise without authentication.

Affected Products

• CodeAstro Restaurant POS System version 1.0
• update_product.php component

Discovery Timeline

• 2024-02-07 - CVE-2024-1268 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-1268

Vulnerability Analysis

This vulnerability is classified as CWE-434 (Unrestricted Upload of File with Dangerous Type). The update_product.php file in the CodeAstro Restaurant POS System lacks proper file type validation mechanisms, allowing attackers to bypass intended restrictions and upload files with executable extensions such as .php, .phtml, or other server-side script formats.

The vulnerability is particularly dangerous because it can be exploited remotely without any prior authentication or user interaction. An attacker can craft a malicious HTTP request to upload a web shell or backdoor directly to the server, gaining persistent access to the underlying system.

Root Cause

The root cause of this vulnerability stems from insufficient input validation in the file upload functionality within update_product.php. The application fails to implement proper security controls including:

• Validation of file extensions against an allowlist
• MIME type verification of uploaded content
• Content-based file type inspection
• Restrictions on upload directory execution permissions

Without these safeguards, the application accepts and stores any file type submitted through the product update interface.

Attack Vector

The attack can be initiated remotely over the network. An attacker targets the update_product.php endpoint and submits a crafted multipart form request containing a malicious file disguised or presented as a legitimate product image or document. Once uploaded, the attacker can directly access the malicious file through the web server, triggering code execution with the privileges of the web server process.

The exploitation flow typically follows these steps:

1. Attacker identifies the vulnerable update_product.php endpoint
2. A malicious PHP web shell or similar payload is crafted
3. The file is uploaded through the unprotected endpoint
4. The attacker accesses the uploaded file via direct URL
5. Remote code execution is achieved on the target server

For technical details and proof-of-concept information, refer to the VulDB entry #253011.

Detection Methods for CVE-2024-1268

Indicators of Compromise

• Unexpected PHP, PHTML, or other executable files appearing in product upload directories
• Web server logs showing POST requests to update_product.php with unusual file extensions
• Newly created files with obfuscated names or suspicious content in web-accessible directories
• Outbound network connections originating from the web server process

Detection Strategies

• Implement file integrity monitoring on web application directories to detect unauthorized file creation
• Configure web application firewalls (WAF) to inspect multipart form uploads for malicious content
• Monitor HTTP request logs for upload attempts with executable file extensions
• Deploy endpoint detection and response (EDR) solutions to identify web shell execution patterns

Monitoring Recommendations

• Enable detailed logging for the update_product.php endpoint and all file upload activities
• Set up alerts for file creation events in product upload directories
• Monitor process execution chains from web server processes for suspicious child processes
• Review server access logs regularly for reconnaissance and exploitation attempts targeting POS system endpoints

How to Mitigate CVE-2024-1268

Immediate Actions Required

• Restrict access to the update_product.php file via web server configuration or remove it if not essential
• Implement network-level access controls to limit who can reach the Restaurant POS System
• Place the application behind a properly configured web application firewall
• Audit existing upload directories for any previously uploaded malicious files

Patch Information

As of the last modification date (2024-11-21), no vendor-provided patch has been publicly documented for this vulnerability. Organizations using CodeAstro Restaurant POS System 1.0 should contact the vendor directly for remediation guidance or consider implementing the workarounds below.

Workarounds

• Implement server-side file type validation using allowlists for permitted extensions (e.g., .jpg, .png, .gif)
• Add MIME type verification to ensure uploaded content matches the declared file type
• Configure the upload directory to be non-executable by the web server
• Rename uploaded files using random identifiers and store original names in a database
• Consider isolating the POS system from direct internet access using network segmentation

# Apache configuration example to disable script execution in upload directory
<Directory "/var/www/html/pos/uploads">
    Options -Indexes -ExecCGI
    AllowOverride None
    <FilesMatch "\.(php|phtml|php3|php4|php5|phps|cgi|pl|py)$">
        Require all denied
    </FilesMatch>
</Directory>